Valhalla

Valhalla, Old Norse Valhöll,
in Norse mythology, the hall of slain warriors, who live there blissfully under the leadership of the god Odin. Valhalla is depicted as a splendid palace, roofed with shields, where the warriors feast on the flesh of a boar slaughtered daily and made whole again each evening. They drink liquor that flows from the udders of a goat, and their sport is to fight one another every day.

Thus they will live until the Ragnarök (Doomsday), when they will march out the 540 doors of the palace to fight at the side of Odin against the giants. When heroes fall in battle it is said that Odin needs them to strengthen his forces for the Ragnarök.